04 Sep '11, 4pm

Good morning from base camp, located at the Black Point Lava Flow, Arizona...

Good morning from base camp, located at the Black Point Lava Flow, Arizona...

The otherworldly footprint of black basaltic lava creates a striking landscape at Black Point Lava Flow in northern Arizona, seen in this photograph taken from the International Space Station. The flow is part of Arizona’s San Francisco Volcanic Field, a group of geologically young (approximately six million to less than one thousand years old) volcanoes, lava flows, and cinder cones located just north of Flagstaff, Arizona. When it erupted onto the surface, the Black Point Lava flowed eastward over the older Permian and Triassic sedimentary rock sequences (spanning the period from roughly 300 to 240 million years ago) that are so well known around the vicinity of the Grand Canyon. The eastern edge of the flow slumps down to the surrounding plain, and it ends along the Little Colorado River (lower right). Black Point Lava Flow is an excellent setting for training and syste...

Full article: http://earthobservatory.nasa.gov/IOTD/view.php?id=40076

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earthobservatory.nasa.gov 12 Sep '11, 10pm

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earthobservatory.nasa.gov 04 Sep '11, 10pm

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